Sheet material



FIG. 1 is a top perspective view of sheet material showing my new design with two edge broken-away to indicate indeterminate size;

FIG. 2 is a top plan view thereof, the bottom being flat and plain;

FIG. 3 is a cross-sectional view thereof as taken from line 3--3 of FIG. 2. 

The ornamental design for sheet material, as shown and described. 